Java Arrays

Quiz
•
Computers
•
University
•
Hard
Jeevitha P
Used 567+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is FALSE about arrays on Java
A java array is always an object
Length of array can be changed after creation of array
Arrays in Java are always allocated on heap
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Predict the output?
public class Main {
public static void main(String args[]) {
int arr[] = {10, 20, 30, 40, 50};
for(int i=0; i < arr.length; i++)
{
System.out.print(" " + arr[i]);
}
}
}
10 20 30 40 50
Compiler Error
10 20 30 40
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
class Test {
public static void main(String args[]) {
int arr[2];
System.out.println(arr[0]);
System.out.println(arr[1]);
}
}
0
0
garbage value
garbage value
Compiler Error
Exception
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
public class Main {
public static void main(String args[]) {
int arr[][] = new int[4][];
arr[0] = new int[1];
arr[1] = new int[2];
arr[2] = new int[3];
arr[3] = new int[4];
int i, j, k = 0;
for (i = 0; i < 4; i++) {
for (j = 0; j < i + 1; j++) {
arr[i][j] = k;
k++;
}
}
for (i = 0; i < 4; i++) {
for (j = 0; j < i + 1; j++) {
System.out.print(" " + arr[i][j]);
k++;
}
System.out.println();
}
}
}
Compiler Error
0
1 2
3 4 5
6 7 8 9
0
0 0
0 0 0
0 0 0 0
9
7 8
4 5 6
0 1 2 3
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following is the correct way of importing an entire package ‘pkg’?
import pkg.
Import pkg.
import pkg.*
Import pkg.*
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is/are advantages of packages?
Packages avoid name clashes
Classes, even though they are visible outside their package, can have fields visible to packages only
We can have hidden classes that are used by the packages, but not visible outside.
All of the above
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of these is a mechanism for naming and visibility control of a class and its content?
Object
Packages
Interfaces
None of the above
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